package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增分类
     * @param categoryDTO
     */
    public void save(CategoryDTO categoryDTO) {
        //思考：尽量使用实体类型进行添加
        //复制拷贝
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);

        //添加没有的属性
        //默认禁用状态为0
        category.setStatus(StatusConstant.DISABLE);
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.insert(category);
    }

    /**
     * 分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {

        //思考
        //
        Page<Category> page=categoryMapper.pageQuery(categoryPageQueryDTO);
        //封装进了total  和  相关list
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 根据id删除分类
     * @param id
     * @return
     */
    public void deleteById(Long id) {
        //思考 应该简单删除加上是否有级联关系
        //查询当前分类是否关联了菜品,如果关联了就跑出业务异常
        Integer count=dishMapper.countByCategoryId(id);
        if(count>0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //查询当前分类是否关联了套餐,如果关联了就跑出业务异常
        count=setmealMapper.countByCategoryId(id);
        if(count>0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //删除分类数据
        categoryMapper.deleteById(id);
    }

    /**
     * 修改分类
     * @param categoryDTO
     */
    public void update(CategoryDTO categoryDTO) {
        //思考  动态修改 update from category set ...   where
        //填充对象
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);


        //有单独修改状态的地方
//        category.setStatus(StatusConstant.DISABLE);

//        category.setUpdateTime(LocalDateTime.now());

//        category.setUpdateUser(BaseContext.getCurrentId());

        //mapper中进行修改
        categoryMapper.update(category);


    }

    /**
     * 启动或者禁用
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        //思考：  就是简单根据set status=?  where id=?
//        categoryMapper.update(status,id);
        //封装一下
        Category category = Category.builder()
                .id(id)
                .status(status).build();
        categoryMapper.update(category);
    }


    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    public List<Category> list(Integer type) {
        //思考   where type=?
        return categoryMapper.list(type);

    }


}
